Conversion of YIQ image to RGB

[cbecer2003]

i want to show Y, I and Q components of the YIQ image.
i get these components by using

Yframe=0.299*Rframe+0.587*Gframe+0.114*Bframe;
Iframe=0.596*Rframe-0.275*Gframe-0.321*Bframe;
Qframe=0.212*Rframe-0.523*Gframe+0.311*Bframe;

after this,can i use 'imshow' like that

imshow(Yframe);
imshow(Iframe);
imshow(Qframe);

Must i use colormap or back to RGB?

 

[Sreya39]

Re: RGB - YIQ CONVERSION

Here is the code to display RGB images in three planes

RGB = imread('peppers.jpg')
[m,n]=size(RGB);
for i=1:m
for j=1:n/3
R(i,j)=RGB(i,j,1);
G(i,j)=RGB(i,j,2);
B(i,j)=RGB(i,j,3);
end
end
figure;imshow(R);
figure;imshow(G);
figure;imshow(B);

Added after 6 minutes:

Here is the code for HSI t0 RGB conversion ...just go through this ...u will get an idea..

clc;
clear all;
close all;
RGB= imread('peppers.png');
figure;imshow(RGB);title('original image');
HSI1=rgb2hsv(RGB);
HSI=imread('HSI1.png');
figure;imshow(HSI);title('HSI image');
HSI=double(HSI);
[m,n]=size(HSI);
RGB=hsv2rgb(HSI1);
figure;imshow(RGB);
for i=1:m
for j=1:n/3
R(i,j)=RGB(i,j,1);
G(i,j)=RGB(i,j,2);
B(i,j)=RGB(i,j,3);
end
end
figure;imshow(R);
figure;imshow(G);
figure;imshow(B);
for i=1:m
for j=1:n/3
H(i,j)=HSI(i,j,1);
S(i,j)=HSI(i,j,2);
I(i,j)=HSI(i,j,3);
%RG sector
if(H(i,j)>=0 && H(i,j)<120)
B(i,j)=I(i,j)*(1-S(i,j));
R(i,j)=I(i,j)*(1+(S(i,j)*cos(H(i,j))/cos(60-H(i,j))));
G(i,j)=1-(R(i,j)+B(i,j));
end
%GB Sector
if(H(i,j)>=120 && H(i,j)<240)
%H(i,j)=H(i,j)-120;
R(i,j)=I(i,j)*(1-S(i,j));
G(i,j)=I(i,j)*(1+(S(i,j)*cos(H(i,j))/cos(60-H(i,j))));
B(i,j)=1-(R(i,j)+G(i,j));
end
%BR Sector
if(H(i,j)>=240 && H(i,j)<360)
%H(i,j)=H(i,j)-240;
G(i,j)=I(i,j)*(1-S(i,j));
B(i,j)=I(i,j)*(1+(S(i,j)*cos(H(i,j))/cos(60-H(i,j))));
R(i,j)=1-(G(i,j)+B(i,j));
end
end
end
HSI=uint8(HSI);
for i=1:m
for j=1:n/3
RGB(i,j,1)=R(i,j);
RGB(i,j,2)=G(i,j);
RGB(i,j,3)=B(i,j);
end
end
figure;imshow(uint8(RGB),[]);
imwrite(RGB,'RGB1.png');
imshow('RGB1.png');title('RGB Image');
figure;imshow(uint8(R),[]);title('R Image');
figure;imshow(uint8(G),[]);title('G Image');
figure;imshow(uint8(B),[]);title('B Image');